Home / 20,725.20-28,600.77-11,293.76

Finding the Fourth Proportional to 20,725.20, 28,600.77 and 11,293.76

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Solution

The fourth proportional to 20,725.20, 28,600.77 and 11,293.76 is: 15,585.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,725.20 : 28,600.77 = 11,293.76 : x
  2. Step 2: Convert to fraction form
    20,725.20/28,600.77 = 11,293.76/x
  3. Step 3: Cross multiply
    20,725.20x = 28,600.77 × 11,293.76
  4. Step 4: Simplify right side
    20,725.20x = 323,010,089.19
  5. Step 5: Solve for x
    x = 323,010,089.19/20,725.20
  6. Step 6: Final answer
    x = 15,585.38

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Half scale
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.